Why Does The Penis Not Manage To Get Into The Vagina And Causes Pain ?

Hello. I am a virgin and i am really worried about my sex life. Me and my boyfriend have tried it and his penis just doesn t manage to get in my vagina. I have tried to stretch it by fingering myself but it doesn t work. Well if his penis does go through, it only goes in a little bit and it hurts a lot! Yesturday we tried it and today i woke up with a small amour of blood when i urinate. It doesn t hurt when i urinate but i am really worried about these problems! What if i cant ever have sex, please help me!